[Freeswitch-users] Sipura Codec Problem

[Mariano de Llano]

Hi,

I'm having a problem with a Sipura, it is sending for the G729  the  
tag "G729a" witch is not correct due the RFC.

Media Attribute (a): rtpmap:18 G729a/8000

FS is returning (200OK)

Media Attribute (a): rtpmap:96 G729/8000

I think that the problem is that FS is not matching the codec, so it  
returns the first dynamic payload which is 96.

I think that I've seen post with a similar issue, and the solution was  
to change the tag before it hit the switch, so, what I've done is to  
change the "switch_r_sdp" (I have the rest of the parameters correct  
due I also use it to dynamically change the codecs order) and it's  
changing the SDP, but when FS sends the 200OK it is returning to the  
endpoint:

Media Attribute (a): rtpmap:96 G729/8000

Which is exactly the same problem that I have without the  
transformation of the SDP.

Is it correct? Do I have another solution?

Thanks